Method of removing air from water



E. PIRON METHOD OF REMOVING AIR FROM WATER Dec. 28 1926. 1,612,218

Original Filed July 10, 1922 INVENTOR l dw A 1.

M ATTORNEY column.

Patented Dec. 28, 1926.

UNITED STATES EMIL PIRON, OF NEW Your. Y,

METHOD OF REMOVING AIR FROM WATER.

-1 App1ication filed July 10, 1922, Serial No. 574,049. Renewed March 4, 1926.

For certain industrial purposes, it is desirable to remove from water the air which most Water contains. This has been done heretofore by several methods, all of which are more or less ineflicient and uneconomical because they are dependent in a large measure on the heating of the Water toa relatively high temperature which, while it drives 01f, much the larger portion of the I" occluded air, also carries off in the form of vapor a considerable percentage of the water itself, so that not only is a relatively large amount of heat required to .raise the Water to the desired temperature, but unless 15, special precautions are taken to prevent it,

air may-be driven from the Water with a smaller, or no, expense of heat.

In practice, I use, a distilling. column divided into any suitable number of compartments, and into the top of the column 2 I introduce the water from which the air is to be driven. As is well understood in the use of such columns, this Water may be passed down successively through the different compartments formed by the plates and will pass out through an outlet at the bottom of the column. At the same time, and as the water is passing down through the column, it is brought in contact with a vapor or as-passing upward through the This vapor or gas may be some fixed gas, such as ordinary illuminatinggas or natural gas, or, as I prefer for some purposes, a vapor of liquid which is non-miscible with water, such, for instance, as tetrachloride of carbon.

The method may be carried out and the water successfully deaerated at temperatures materially below 100 (1, the normal boiling point of Water. When a fixed gas,

' such as illuminating gas, is used as the ascendin gas, this gas will take up and carry 0 the air contained in the Water at ordinary room temperature so that no consumption of heat is required for afi'ectingvthe deaeration.

hen the vapor of liquid non-miscible with water, such as tetrachlorids of carbon, is used, the method may be carried out at a temperature as low as C. so that the consumption of heat is small. In this case, a part of the method consists in recovering the liquid by passing the vapor and the air contained thgrein into a condenser in which the liquid vapor will be condensed While the air will escape.

The accompanying drawing shows diagrammatically and in elevation an ordinary distilling column in which the method may be carried out. In practicing the method by means of the apparatus shown, water is introduced through a pipe 10'at the top of the column and flows down over the plates 11 and through the pipes '12 connecting the compartments formed by the plates. The fixed gas, or the liquid non-miscible with water Whose vapor is to be used, is introduced into the bottom of the column through a pipe 15. In the passage of the gas or vapor up through the column it is brought into intimate contact with the descending water by means of the usual deflectors 16. The gas or vapor, together with the air which it takes from the water,

escapes at the top of the column through a pipe 17 If the vapor of a liquid non-miscible with water is used, a heating coil 20 may be introduced at the bottom of the column and the vapor escaping through the'pipe 17 may be led through a condenser 21. The liquid condensed from the vapor is collected in a tank'22 for re-use, and the air escapes through an outlet 23.

I claim:

1. The method of deaerating water, which consists in bringing the water to be deaerated into contact with a fixed air-absorbing gas at a temperature materially less" than 100 C. by passing the water and gas in opposite directions through a distilling column.

2. The method of deaerating water, which consists in bringing. the water to be deaerated into contact, at a temperature materially less than 100 0., with the vapor of a liquid which is non-miscible with water and Whose vapor is capable ofabsorbing air,

by passing the water and said vapor passing the water and said vapor through through a distilling column in opposite a distilling column in opposite directions, 10

directions. and condensing the vapor after it has 3. The method of deaerating water, which passed through the column.

5 consists in bringing the water to be de- In testimony whereof I have hereunto aerated into contact with the vapor of a set my hand. liquid non-miscible with Water at a temperature materially less than 100 C. by. EMIL PIRON. 

